Marine plow



D. M- GLASER Sept. 1 1952 MARINE now 2 SHEETS-SHEET 1 Filed Feb. 2, 1949 FQQ . ion lw Inventor Donald M. Glaser D. M. GLASER- Sept. 16, 1952 MARINE PLOW 2 SHEETS-SHEET 2 Filed Feb. 2, 1949 Inventor Qana/d M. Glaser By W W Patented Sept. 16, 1952 UNITED STATES OFFICE MA'RINE D'cnaldiMorrisGlaser, liaiayette, Um. Applicationllebrnary 2, 19.49;.Serial'No; 7145078 2. Claims. 1

This; inventionrelates to; a plow of; novel con-- struction for; the; primarypurpose of; di in trenches-.or ditchesof; predetermined depth in; the bed of a body; of. Water; particularly a, river,- or shallow stream: for; the subsequent. l ying of submarine cables, sewer pipes oil or; pipe; linea: etc...

An. important. object: of. this; invention. is; to rovide a. plow on. novel. construction. which. is detachably secured to floatation. tank: which may. bezfillediwith fluid .suc l1.as water; when. it. is desired tov lower; the; plow: to the bottom of" the watenfbr. the-purposeeoffopening.a trench; Cone versely; the; tank may; be; emptied. to. bring: the plowback to.the,-surf ace'ofthe water.

A stilljurther objectiof this invention is to provide a; plow. of the character described inwhich the'floatation tank is further providedwith separate compartments-for selectively receiving water toballast thefloatation tank to a desired degree and to enable' the-operator to add or eliminate water when desired. The floatation tank, when filled with water, drags on the surface of the water bottom andprovides the means of having the trenchdugat an even depth.

A still further object of this invention. is: to provide a marine plow of the-character described including a jet tube positioned immediately in front'of the plow itself for the delivery ofaspray of water to' the'bed -for--softening-the latter-while a trench is being--dug'bythe-plow.

A still further-object of'this, invention is to provide. a plow ofthe character-described in' which the plow'itselfis especiallyconstructed, and designed" to dig a trenchand removethe dirt therehom while simultaneously preventing. the refilling'of the trench with" dirtremoved.

These, together with various ancillary objects and features of the invention which will later become apparent as the following description proceeds, are attained by the device, a preferred embodiment of which has been illustrated by way of example only in the accompanying drawings, wherein:

Figure 1 is a side elevational view of the plow of the instant invention as attached to a boat;

Figure 2 is a side elevational View of the plow shown detached from the boat;

Figure 3 is a top plan view of the plow;

Figure 4 is an end elevational view looking to the left on Figure 2;

Figure 5 is a sectional view taken substantially V in the plane of section line 55 of Figure 3;

Figure 6 is a side elevational view of the plow itself shown detached from the floatation chamher; and

Figure '7 is, miragmentary diagrammatic view illustratinggthe. means. of: delivering water to the jet.

Specific; reference will now be made tothe drawings In-theseyeralwiewsin the accompanying; drawings; and in the; following, specification like; reference; characters; indicate corresponding elements..-throughoutz.

The device; of: the; instant: invention. consists essentially of two importantstructural features; namely, a .floatation:chamberz-generally.indicated at; 1,0 anda plow removably. attached theretoigem erally indicated'zat l2; Asshowncl'early 'in' Figures 2, .3 and 5:. theefloatation; chamber. I ll; is a. hollow housing the shape of. aniarrowhead having top: andf bottom walls I4: and. I5, rearwardly diverging: side. walls. I 8 and 2 llzandtinwardly convergingrear-walls2 2i and 24. Theirontor apex of" the floatation chamber is provided with an aperturedplate zdforadjustably receiving ahook 28- attached" to a cable 30 operated by' a winch 32 onthepullingvessel 3-4i Thefioatation chamber is further provided with inwardly dispos'ed vertically extending partitions or baffles 36, see Figure 3, preferably arranged in the form of a triangle so that four separate and distinct compartments 35', 40',- 42, and 44 are provided. Eachof'the-compartments includes a,- pair of vertically extending'pipesor conduits 46' and 48-='whichextend through the top wall I4 of the housing I0 and carry suitable couples 5'0 and 52', respectively. One of the pipes 46 preferably extends to a position adjacent the bottom I 6 'of theliousing l0" and will be employed forselectively-introducing a fluid such as water into the compartment whilethe-other conduit 48 extends into the compartment just beyond the top wall I4 and is adapted to be secured to a compressed air line for blowing out the water from the conduit 46 (when opened) when it i desired to remove water from the compartment. Thus it will be seen that a floatation chamber is provided which can be readily and easily filled with water to supply ballast for the attached plow 12. By providing separate compartments and means for selectively filling each of the compartments with water and means for removing the water from each of the compartments, the weight of the ballast can be desirably and adjustably shifted depending upon the depth of trench desired.

At this point, the exact construction of the plow I2 will be described. A particular construction is provided so that a proper trench can be formed at the water bed or bottom 54 in such a manner that the dirt removed from the trench will be prevented from re-entering the trench.

The plow consists of a central "vertically extending member 55 which is cut out at its forward end as at 58 to provide a recess for retaining a transversely extending plate 60 across the top edge of the plow. To the rear of the floatation chamber l9 and suitably supported upon the bottom wall I6 thereof is a further plate or block 62 and bolts 64 are provided which extend through the plate 60 and the block 62 for secur= ing the central member and other associated plow elements to the floatation chamber.

Intermediate the ends of the central member 56 and adjacent the top edge thereof, a pair of rearwardly diverging dirt-spreading wings or arms 66 are provided which are welded or riveted to the central member 56 as at 68. The rear or free edges of the wings are preferably interconnected by means of a transversely extending rear plate 10. Secured to the dirt-spreading wings 65 are a pair of arms 12, preferably in the form of angles which are 'apertured at their free ends and inturned as at 74 to receive a bolt '16 for attachment to the rear walls 22 and 24 of the floatation chamber I 6. Welded or riveted to the bottom edges of the wings 66 and further secured to the front corners of the central plate 56 are arcuated mold boards 18. This construction of a plow permits the effective digging of a trench, removal of dirt therefrom, and prevention of re-entry of the dirt within the trench.

To soften the river or stream bottom 59 just in front of the plow, a jet tube 8% is provided which passes through the top and bottom walls of the floatation chamber [0 and terminates just in front of the front edge of the central plate 56 of the plow. The jet tube 80 is threaded as at $2 to receive an appropriate coupling attached to a water delivery line 84 operatively connected to a pump 86 carried on the vessel 3 which pump is appropriately driven by a motor (not shown). The pump draws water from the river or stream via a valved conduit 88 which extends into the water and which has a screen Q0 attached thereto to filter the water before it is delivered to the jet 8B.

Thus it will be seen that an extremely effective plow is provided that can be readily pulled by a vessel. The plow is of such construction that a trench of appropriate depth is dug and the plow may be easily raised and lowered by merely withdrawing or adding water to selected compartments in a floatation chamber attache-cl to the plow.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, howeverythat even though there is herein shown and described a preferred embodiment, of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. In a marine plow an arrowhead-shaped flotation chamber comprising top and bottom walls, rearwardly diverging side walls, said side walls terminating in an apex, a forwardly extending apertured plate secured to the apex of said side walls, forwardly extending, inwardly converging rear walls secured to the rear ends of said side walls, a plurality'of baffles dividing said chamber into a plurality of compartments, a plow, a plate mounted on said plow, a plate mounted on said chamber, meansjoining said plates together for mounting said plow on said chamber, means operatively associated with said compartments for selectively filling and removing liquid from said compartments.

2. In a marine plow an arrowhead-shaped floatation chamber comprising top and bottom walls, rearwardly'diverging side walls, said side walls terminating in an apex, a forwardly extending apertured plate secured to the apex of said side walls, three bafiies arranged in triangular formation in said chamber, said baffles dividing said chamber into four separate compartments, a plow, a plate mounted on said plow, a plate mounted on said chamber, means joining said plates together for mounting said plow on said chamber, means operatively associated with said compartments for selectively filling and removing liquid from said compartments.

DONALD MORRIS GLASER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 196,645 Eads Oct. 30, 1877 196,646 Eads Oct. 30, 1877 296,483 Stone Apr. 8, 1884 321,355 Gifford et al June 30, 1885 486,957 Schaifer Nov. 29, 1892 499,042 Robbins June 6, 1893 1,270,142 Gage June 18, 1918 2,144,743 Schultz Jan. 24, 1939 

